Synthesis of monodisperse PbSe nanorods: a case for oriented attachment.

Monodisperse, high-quality, single-crystal PbSe nanorods were synthesized in a catalyst-free, one-pot reaction using a new phosphine selenide precursor. PbSe nanorods were assembled to provide liquid-crystalline alignment or vertical alignment under controlled evaporation conditions. The growth of nanorods was monitored by TEM and absorption spectroscopy, indicating that oriented attachment could be involved to provide anisotropic PbSe nanostructures. In-plane XRD showed an enhanced (200) peak for PbSe nanorods, indicating the preferred alignment of nanorods on the substrates and their growth along the <100> direction. Absorption and emission spectra, along with lifetime measurements, show the differences between nanoscale PbSe spheres and rods.

[1]  A. Alivisatos,et al.  Synthesis of PbS nanorods and other ionic nanocrystals of complex morphology by sequential cation exchange reactions. , 2009, Journal of the American Chemical Society.

[2]  Darrick J. Williams,et al.  Utilizing the lability of lead selenide to produce heterostructured nanocrystals with bright, stable infrared emission. , 2008, Journal of the American Chemical Society.

[3]  M. Steigerwald,et al.  Ligand Control of Growth, Morphology, and Capping Structure of Colloidal CdSe Nanorods , 2007 .

[4]  A Paul Alivisatos,et al.  Hybrid solar cells with prescribed nanoscale morphologies based on hyperbranched semiconductor nanocrystals. , 2007, Nano letters.

[5]  Haitao Liu,et al.  Electric-field-assisted assembly of perpendicularly oriented nanorod superlattices. , 2006, Nano letters.

[6]  P. Prasad,et al.  Shape control of PbSe nanocrystals using noble metal seed particles. , 2006, Nano letters.

[7]  K. Hull,et al.  Induced Branching in Confined PbSe Nanowires , 2005 .

[8]  Kyung-Sang Cho,et al.  Designing PbSe nanowires and nanorings through oriented attachment of nanoparticles. , 2005, Journal of the American Chemical Society.

[9]  Ilan Gur,et al.  Hybrid Organic-Nanocrystal Solar Cells , 2005 .

[10]  Lin-Wang Wang,et al.  Cadmium selenide quantum wires and the transition from 3D to 2D confinement. , 2003, Journal of the American Chemical Society.

[11]  B. Korgel,et al.  Solventless synthesis of monodisperse Cu2S nanorods, nanodisks, and nanoplatelets. , 2003, Journal of the American Chemical Society.

[12]  V. Bulović,et al.  1.3 μm to 1.55 μm Tunable Electroluminescence from PbSe Quantum Dots Embedded within an Organic Device , 2003 .

[13]  Liang-shi Li,et al.  Semiconductor Nanorod Liquid Crystals and Their Assembly on a Substrate , 2003 .

[14]  A. P. Alivisatos,et al.  Shape control and applications of nanocrystals , 2003, Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences.

[15]  Jiayu Zhang,et al.  Electronic structure transformation from a quantum-dot to a quantum-wire system: Photoluminescence decay and polarization of colloidal CdSe quantum rods , 2002 .

[16]  Frank W. Wise,et al.  Optical Properties of Colloidal PbSe Nanocrystals , 2002 .

[17]  Stephen Mann,et al.  Liquid crystalline assemblies of ordered gold nanorods , 2002 .

[18]  Zhiyong Tang,et al.  Spontaneous Organization of Single CdTe Nanoparticles into Luminescent Nanowires , 2002, Science.

[19]  A. P. Alivisatos,et al.  Epitaxial growth and photochemical annealing of graded CdS/ZnS shells on colloidal CdSe nanorods. , 2002, Journal of the American Chemical Society.

[20]  Andreas Kornowski,et al.  Self-assembly of ZnO: from nanodots to nanorods. , 2002, Angewandte Chemie.

[21]  A. Alivisatos,et al.  Hybrid Nanorod-Polymer Solar Cells , 2002, Science.

[22]  Weidong Yang,et al.  Linearly Polarized Emission from Colloidal Semiconductor Quantum Rods , 2001, Science.

[23]  Christopher B. Murray,et al.  Synthesis and Characterization of Monodisperse Nanocrystals and Close-Packed Nanocrystal Assemblies , 2000 .

[24]  Sun,et al.  Monodisperse FePt nanoparticles and ferromagnetic FePt nanocrystal superlattices , 2000, Science.

[25]  Banfield,et al.  Imperfect oriented attachment: dislocation generation in defect-free nanocrystals , 1998, Science.

[26]  F. Wise,et al.  Electronic structure and optical properties of PbS and PbSe quantum dots , 1997 .

[27]  Peter Nordlander,et al.  Plasmonic nanostructures: artificial molecules. , 2007, Accounts of chemical research.

[28]  Stephen Mann,et al.  Proceedings of the Chemical Society. November 1962 , 1962 .